ARM: Add Calxeda Highbank platform

Add basic support for Calxeda Highbank platform. Only minimal support with
serial and SATA are included.

Signed-off-by: Jason Hobbs <jason.hobbs@calxeda.com>
Signed-off-by: Rob Herring <rob.herring@calxeda.com>
Cc: Albert ARIBAUD <albert.u.boot@aribaud.net>

2 files changed, 169 insertions, 0 deletions

diff --git a/arch/arm/cpu/armv7/highbank/Makefile b/arch/arm/cpu/armv7/highbank/Makefile
new file mode 100644
index 0000000..76faeb0
--- /dev/null
+++ b/arch/arm/cpu/armv7/highbank/Makefile
@@ -0,0 +1,46 @@
+#
+# (C) Copyright 2000-2006
+# Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+#
+# See file CREDITS for list of people who contributed to this
+# project.
+#
+# This program is free software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public License as
+# published by the Free Software Foundation; either version 2 of
+# the License, or (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+# MA 02111-1307 USA
+#
+
+include $(TOPDIR)/config.mk
+
+LIB	= $(obj)lib$(SOC).o
+
+COBJS	:= timer.o
+SOBJS	:=
+
+SRCS	:= $(SOBJS:.o=.S) $(COBJS:.o=.c)
+OBJS	:= $(addprefix $(obj),$(COBJS) $(SOBJS))
+
+all:	$(obj).depend $(LIB)
+
+$(LIB):	$(OBJS)
+	$(call cmd_link_o_target, $(OBJS))
+
+#########################################################################
+
+# defines $(obj).depend target
+include $(SRCTREE)/rules.mk
+
+sinclude $(obj).depend
+
+#########################################################################
diff --git a/arch/arm/cpu/armv7/highbank/timer.c b/arch/arm/cpu/armv7/highbank/timer.c
new file mode 100644
index 0000000..d8a0288
--- /dev/null
+++ b/arch/arm/cpu/armv7/highbank/timer.c
@@ -0,0 +1,123 @@
+/*
+ * Copyright 2010-2011 Calxeda, Inc.
+ *
+ * Based on arm926ejs/mx27/timer.c
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the Free
+ * Software Foundation; either version 2 of the License, or (at your option)
+ * any later version.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <common.h>
+#include <div64.h>
+#include <linux/types.h>        /* for size_t */
+#include <linux/stddef.h>       /* for NULL */
+#include <asm/io.h>
+#include <asm/arch-armv7/systimer.h>
+
+#undef SYSTIMER_BASE
+#define SYSTIMER_BASE		0xFFF34000	/* Timer 0 and 1 base	*/
+#define SYSTIMER_RATE		150000000
+
+static ulong timestamp;
+static ulong lastinc;
+static struct systimer *systimer_base = (struct systimer *)SYSTIMER_BASE;
+
+/*
+ * Start the timer
+ */
+int timer_init(void)
+{
+	/*
+	 * Setup timer0
+	 */
+	writel(SYSTIMER_RELOAD, &systimer_base->timer0load);
+	writel(SYSTIMER_RELOAD, &systimer_base->timer0value);
+	writel(SYSTIMER_EN | SYSTIMER_32BIT, &systimer_base->timer0control);
+
+	reset_timer_masked();
+
+	return 0;
+
+}
+
+#define TICK_PER_TIME	((SYSTIMER_RATE + CONFIG_SYS_HZ / 2) / CONFIG_SYS_HZ)
+#define NS_PER_TICK	(1000000000 / SYSTIMER_RATE)
+
+static inline unsigned long long tick_to_time(unsigned long long tick)
+{
+	do_div(tick, TICK_PER_TIME);
+	return tick;
+}
+
+static inline unsigned long long time_to_tick(unsigned long long time)
+{
+	return time * TICK_PER_TIME;
+}
+
+static inline unsigned long long us_to_tick(unsigned long long us)
+{
+	unsigned long long tick = us << 16;
+	tick += NS_PER_TICK - 1;
+	do_div(tick, NS_PER_TICK);
+	return tick >> 16;
+}
+
+unsigned long long get_ticks(void)
+{
+	ulong now = ~readl(&systimer_base->timer0value);
+
+	if (now >= lastinc)	/* normal mode (non roll) */
+		/* move stamp forward with absolut diff ticks */
+		timestamp += (now - lastinc);
+	else			/* we have rollover of incrementer */
+		timestamp += (0xFFFFFFFF - lastinc) + now;
+	lastinc = now;
+	return timestamp;
+}
+
+/*
+ * Delay x useconds AND preserve advance timstamp value
+ *     assumes timer is ticking at 1 msec
+ */
+void __udelay(ulong usec)
+{
+	unsigned long long tmp;
+	ulong tmo;
+
+	tmo = us_to_tick(usec);
+	tmp = get_ticks() + tmo;	/* get current timestamp */
+
+	while (get_ticks() < tmp)	/* loop till event */
+		 /*NOP*/;
+}
+
+ulong get_timer(ulong base)
+{
+	return get_timer_masked() - base;
+}
+
+void reset_timer_masked(void)
+{
+	lastinc = ~readl(&systimer_base->timer0value);
+	timestamp = 0;
+}
+
+void reset_timer(void)
+{
+	reset_timer_masked();
+}
+
+ulong get_timer_masked(void)
+{
+	return tick_to_time(get_ticks());
+}